Apparatus for reducing coal.



H ADAMS.

APPARATUS FOR REDUCING COA L. APPLICATION FILED SEP'l 20. 1915.

; :fig@9'3,655;, Patented Feb. 11, 1919.

mf ihl H ll WITNESS IIWENTOH present instance illllS ui caning face comprises a series of anvils which rest upon a suitable base 10. In the inner sideof the breaking face 9 are fixed a series of pins'or studs 11. These are shown in the drawing as being threaded so as to screw into place and be separately removable either for repair or for varying the number of studs in the breaking face. Beneath the breaking face and suitably supported is an inverted conical screen .l2'which is made up of a series of rods connected together. This screen may be variously constructed but its purpose is to receive the broken coal as it travels from the breaking face, carrying the largest broken pieces to a central hopper 13 and permitting the smaller broken pieces to pass through the screen and thereby immediately separate from these largest broken pieces. 14 and 15. are guides which partly surround the screen 12 on one side and extend-outward and downward therefrom. similar guides arrang'ed on the opposite side of the screen 12 so that all of the broken coal passing through the screen falls upon the guides described.

The breaking face is'prov'ided with a inultiplicity of apertures 18 in close juxtaposition' to the pins ll. 19, 20 and 21 are a se ries'of guides which partly surround the breaking face on one side and extend outward and downward therefrom. These guide receive the broken coal as it passes through the apertures in the breaking face. A similar set of guides 22, 23 and 24 is arranged on the opposite side of the breaking face. These guides and the guides leading from the screen 12 may vary in number but it is preferable to use several in order to divide the coal into several streams as it passes through the breaking face and through the screen 12, thereby reducing attrition between t e broken pieces of coal. The guides on one side deliver the broken coal to the conveyor belts 25, 26, and 27 to carry the broken coal frpm the guides to the shaking separator 28.

The shaking separator 28 may be actuated 'by any suitable means as, for example, the cam 29 and belt 30 driven by the electric motor 3, as indicated in the drawing. The coal is separated by means of the shaking separator 28, the fines and dust passing through the separator for delivery to the calm bank. The coal in its separated sizes is preferably delivered from the separator 28 to a gravity pickerpf any well known type whereby t e heavier impurities, such as slate, bone and rock, are removed from the coal.

31 is a cover for the breaking face. 32'is a controller for the motor 3 by means of which the speed of the table 1 may be regulated. 33 is a conveyer to receive from the hopper 13 the coal delivered thereto.

16 and 17 are in lump or smaller size is de ivered from the hopper 8 upon the rotating table 1 where it is caught by the wings 7 and carriedt'around withthe table. T he centrifugalforce thus imparted to the coal throws it outward with great force against the breaking face whereby it is broken into smaller pieces of varying: sizes. A substantial proportion of these smaller broken pieces pass through the apertures of the breaking face, part of such broken pieces being delivered by the guides 19, 20 and 21 and conveyors 25, 26 and 2-7 to the shaking separator 28, and the'rest of the broken pieces being delivered by the guides 22, 23 and 24' to the shakin separator. Such of the pieces broken on tilde breaking face that do not pass through the apertures 18 fall upon the screen 12, the largest of such pieces traveling down the screen to the hopper 13 which delivers them to the conveyer 4:3. The smaller broken pieces that reach the screen pass through the same on to the guides 14:, 15, 16 and 17 from which they are delivered to the shaking separator 28. Guides 14: and 15 deliver the material which they carry upon the conveycrs. Guides 16 and 17 deliver the material which they carry directly to the shaking separator. If the coal delivered to the conveyor 33 requires further reduction, it may be fed to another apparatus and reduced to smaller sizes in a manner similar to that described.

In reducing the coal in the manner described in the foregoing, the large pieces of coal fly with great force against the 'breale ing face and a substantial proportion of the broken pieces travels speedily through the apertures of the breaking face and the rest of it travels to the screen 12 through which or down which it passes. In this movement the coal is substantially free from pulveriz'e ing and breaking concussion and attrition between the largest and the smaller broken pieces and waste is reduced to a minimum.

While the centrifugal table, as shown, is preferred as the best type of projector for imparting movement to the coal in its travel against the breaking face, other types of projector may be employed.

By varying the speed of the centrifugal table,-the impact of the coal against the breaking face may be regulated This controls the amount of smaler sizes produced. The amount of the smaller sizes produced may be diminished by removing some of the conin'iercial sizes,

- ing provided with passages on" both sides of 'said stud, through Which said an annular-anvil surrounding said table comprising upwardly} outwardly inclined walls having gradingjustable breaking-studs.

3. In an apparatus for.

"commercial sizes, the combination of a rotary table; an annular around said talole approximately vertical l P i mLations and adreducing goal to anvil disposed thereto and spaced a distance therefrom sufe ficient for the passage downward by gravity of large pieces of coal between theperiph; eral edge of the tableamlthe anmilaieanvil; and inwardly projecting adjustable pointed studs fixed in said annular anvil; said anvil being provii'led with passages on both sides of Q'lCh of said stpds through which broken pieces of coal may directly pass centrifugally.

This specification signed this 18th day of September, A. D., 1915.

HENRY ADAMS. 

